Top-prop nut.



H. HIGGIN.

TOP PROP NUT.

APPLICATION FILED APR.17, 1905.

Patented Feb. 22, 1910.

A d) "IllllllllllllllllllllH!I Y llllllll 6 C/fo maiz its simplicity of construction and to the HENRY THIGGIN', 0F NEWPORT, KENTUCKY, ASSIGNO-R TO THE HIGGIN MANUFAC- TURING COMPANY, OF NEWPORT, KENTUCKY, A CORPORATION OF WEST VIRGINIA.-

TOP-PROP NUT.

Specification of Letters Patent.

Patented Feb. 22, 1910;

fication.

Among the principal objects of my invention may be mentioned the following First :Accuracy and perfect uniformity in the product of a nut of a given pattern. Secondly :A nut which may be very cheaply produced. Thirdly:.-.A nut of a novel and useful conformation. Fourthly A nut, whereof one or more parts of the complementary covering that may be com bined with it are new and contribute to economy of its manufacture, and alfordother advantages hereinafter specified. Fifthly A nut of a novel conformation, and combined with one or more parts for covering. its end, this novel shape contributing to the better attachment of these parts. Sixthly A nut of a novel conformation, and provlded with a complementary covering, one

or more parts of which are new, and con-v tribute to its snnplicit of construction, and

give the advantages parent. I

The various advantages of my invention including not only those already briefly ereinafter fully aptouched upon, but others, will be fully ap-- parent from the following description and claims. f

In the accompanying drawings, making a part of this s e'cification, and in which similar letters 0 reference indicate corresponding'-.parts,Figure '1 is an" elevation of the front or rear face of a blank from which the nut is constructed. Fig. 2 is an elevation of the edge of this blank. Fig. 3 represents a vertical central section of the article into which the said blank is first formed, and illustrating this step in the process of making this nut. Fig. 4 is a view the artially completed article shown in Fig. 6. ig. 8 is a top view of this article after being subjected to the next step. Fig. 9 is a view in perspective of a completed nut. Fig. 10 is a central vertical section of the nut shown in Fig. 9. Fig. 11 represents a vertical central section of this nut combined with end cap-pieces, the latter being new in such a combination and the nut being intentionally adapted by construction to accomplish this combination in'a veryeflicient manner. The foregoing combination forms a valuable carriage nut. Fig. 12 is a view in perspective of the nut which is the subject of Fig. 111 Fig. 13 is a top view of the cap-piece adapted to be fitted upon the end of the nut of Fig. 9. Fig. 14: is a view in perspective of the cap shown in Fig. 13. Fig. 15 is a view partly in section and partly. in elevation of'the nut and an assemblage of cap-pieces, with which the nut is combined. v

I will now proceed to describe my 1nvention in detail.

Referring to themanner in which the nut is made in order that the completed article may be more fully understood I take a piece of sheet metal, preferably sheet steel. Out

- of this I punch a circular blank A, see Figs.

shape of a cupB, having a top B and wall or sides B in the usual well .known man- 'ner. The next step includes two sub-steps which could be formed in succession, but are preferably 'made simultaneously. One

of these steps COIlSlSiJS of bending out the lower edge of the wall B so as to form the inclined annular edge of C'. The other of these steps is the forming of the corner between thewall B and the top B into an arched top C The central portion C of the top B is at the same time bent into an arched shape, see Fig. 4, for important reasons hereinafter mentioned. The next step causes the edge C of this partially formed nut to be bent outward still more and assume the shape D, illustrated in Fig. 5. After this operation, this partially formed nutis subjected to the action of a die, which forms the inclined edge D into an annular edge or flange E, whose base extends substantially at right angles to the axis of the nut. In this same operation, the outer ed e of the rim is preferably left with a bevel 4 2 on the upper side and with a -b evel E on The preferred number of these faces is four.

The die that forms them is one that is entirely exterior to the wall B". There is no inner die present within this partially formed nut. This outer die is simply one that comes down upon the top of the nut from above and crowds themetal of the wall at the places G back into the. interior spaces X of the nut. The unch crowds the arch toward the center an the-metal being stifl enough to resist going downward, is forced into the punch and centrally into the space X aforementioned. B. this operation, I am enabled to dispense with dies advancing in the same plane against the side simultaneously and the expense attendant upon such dies and their use. It is to be noted that the flattened corner faces G are much thicker than other portions of the wall B and contribute to the general strength of the structure, being integral with the remainder of the wall B and with the flange H. The

I next step consists in flattening" down the top G thereby causing the top ofthe nut to appear asin Fig. 8. At the same time, the e "ge of the flange of the nut is de ressed at E, substantially asshown in igs. -8-

and 9. As a next step, the hole X is cut in the top of the nut, and lastly the screwth'read Z is formed by a ta within the nut. In cutting the hole throng the top of the nut, in or er to carry as much metal as possible down into the body of the nut and to thicken up the walls thereof, thehole, is punched from theoutside, and without providing any inside support. Inasmuch as the general conformation of the space X within the nut is, whenv viewed from the bottom, substantiall' rectangular, the threads of the screw Z wi 1 not be absolutely continuous everywhere, but be intermitted at the corners X of the space X. But the thread is usually continuous at and in the upper edge S.

'The nut is now complete; To this nut may be applied a suitable ca or cover, formed of one or more parts. hus-in Fig. 15, I have shown one klIld of cap united to a nut where the edgos of thejflange H of the nut are as shown in- Fig. 6. In this 'ca shown in Fig. 15,there is a flat metal dis a K,- lying against the bottom of the nut.

Next to this and outside of it is a piece of terial, whose central screw thread, the be the arched top and the broad outwardly ex-' tially as shown. Outside of this there is a disk K of metal, or other suitable inaas to fit overand receive the enlarged portion of the part. K All these disks K, K

ortion is'convex so K are held in place by an annular disk K,

whose edge is'bent up over and upon the flange H of the nut.

The preferred description of cap, and which is of in invention, I willnow describe. There Is a disk M, convexly arched as shown, and provided at its outer edge portion with an annular flange which, relatively to the center of the arch of this disk M,-is much depressed. This annular por- "tion M rests again-st the bottom or under side of the flange H of the nut. Outside of this-I locate a second cap N having its bottom or discal portion N arched away similarly to that of the disk M. This cap has a deep edge extending at an angle,'preferably a right one, to the general plane of the disk. When this cap N is placed in position upon the discal cap M, the edge N of this .cap

extends up and beyond the outer edge of the flange H. At the free edge of this side, the edge N is then bent down and over flange H and into therecess E previously formed upon the nut for its reception. The edge N is preferably corrugated, thus adding to the stiffness of the cap. The arch in the parts M and N is very advantageous,

first, because the cap has increased strength to resist pressureibrought laterally against 1t, and also because there is added space X into which the end Ol the bolt upon which this nut is screwed may project without injuring the ea or forcing it up from the nut. This cappe nut produces a very valuable, useful and advantageous carriage nut. In certain -lines of manufacture, one of these caps M or N, especially cap N, may be omitted, the other cap being retained. In case the cap,

M is retained, it may be held to place by an annular piece such as K, or by any other suitable means. i

What I claim as new, and of my invention and desire to secure by Letters Pat-- cut, is

1. As :1 new article of manufacture, a

top prop nut having a continuous bottom flange substantially circular and beveled above and below to a thin peripheral edge, for the reception of an ornamental cap, the nut having an arched top portion, provided with a central circular aperture, "whose wall is provided interiorliy with a continuous y of the nut between tending flange at the bottom being formed in faces exteriorly flat for the application of a wrench, substantially as'and for the purposes specified.

2. As a new article of manufacture, atop prop nut having a continuous bottom flange substantially circular and beveled above and 'below to a thin-peripheral edge, for the reception of an ornamental cap, the nut having an arched top'portioh provided with a central circular aperture whose'wall is provided interiorly with a continuous screw thread, ,the body of the nut between the arched top and, the broad outwardly extending flange at the bottom being formed in faces exteriorly flat for the application of a wrench, and the inner wall of the nut being likewise formed in faces corresponding-to the exterior faces of the nut, these inner faces being each provided with a portion of a screw thread constituting a contiuuation of the" continuous thread of' the arched portion, substantially as and for the purposes specified.

'3. As a new article of manufacture, a top prop nut having an arched top provided with a central aperture having a continuous screw thread, the body of the nut below the arched top being formed exteriorly and interiorly with flat faces, these interior faces being provided. with screw threads constituting a supplement of the screw thread of the arched top, and below the body the flange extending out therefrom, the wall of the nut tapering and increasing in size from the arched top to and into the bottom flange, the arched top, the nut body and the bottom flange being seamless and integral, substantially as and for the purposes specified.

4. As a new article of manufacture, a seamless top prop nut having anarched top provided with a central aperture having a continuous screw thread, the body of the nut below the arched'top being formed exteriorly and interiorlywith flat faces, the 'interior faces 'being provided with screwthreads for extending the screw portion of the nut for engaging the bolt, and the flange I at the lower end of the body extending out therefrom, and the cap'on the under side of' this flange and having its edges bent over and upon the edge portion of this flange,

substantially as and for the purposes-specified.

5. As a new article of manufacture, a top prop nut having an arched top provided with a central aperture having a continuous screw thread, the body of the nut being formed exteriorly and interiorly with flat faces, the interior faces being provided with screw threads interrupted at the corners of the interior face of the nut, a flange below the body and extending out from the body, the wall of the nut tapering and increasing flange, which latter increases in size from its junction; with the body, the entire nut being seamless and all of its parts integral 'the one with another and a cap spread over the edge portion of the flangejsubstanti'ally as and for the purposes specified. I

v 6. As a new article of manufacture, a top prop nut having an arched top provided with a. central aperture having a continuous screw thread,.the body of the nut below the teriorly with flat faces, the interior flat faces provided with screw threads constitutinga supplement of the screw thread of the arched top, and below the body the flange extending out therefrom, the wall of the nut tapering and increasing in size .from the arched top the arched top, the nut body and .the bottom flange being seamless andintegral and .the cap seamless and integral and covering the HENRY- HIGGIN.

Attest:

Joan E. FITZPATRICK,

7K. SMITH.

in size from the arched top to the bottom to and into the'bottom flange,

bottom flange and the adjacent end of the the bottom of this flanged nut and grasping arched top being formed exteriorly and in- I 

